EP0400257B1 - Schieberverschluss aus einer feuerfesten Masse für metallurgische Behälter - Google Patents

Schieberverschluss aus einer feuerfesten Masse für metallurgische Behälter Download PDF

Info

Publication number
EP0400257B1
EP0400257B1 EP89830243A EP89830243A EP0400257B1 EP 0400257 B1 EP0400257 B1 EP 0400257B1 EP 89830243 A EP89830243 A EP 89830243A EP 89830243 A EP89830243 A EP 89830243A EP 0400257 B1 EP0400257 B1 EP 0400257B1
Authority
EP
European Patent Office
Prior art keywords
refractory
slide
appliance
fact
pouring
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP89830243A
Other languages
English (en)
French (fr)
Other versions
EP0400257A1 (de
Inventor
Giovanni Timossi
Roberto Ricci
Salvatore Foglio
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ilva SpA
Vesuvius Italia SpA
Original Assignee
Ilva SpA
Vesuvius Italia SpA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=8203223&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0400257(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Priority to EP89830243A priority Critical patent/EP0400257B1/de
Priority to DE68926293T priority patent/DE68926293T2/de
Priority to ES89830243T priority patent/ES2020156A4/es
Priority to DE198989830243T priority patent/DE400257T1/de
Priority to AT89830243T priority patent/ATE136828T1/de
Application filed by Ilva SpA, Vesuvius Italia SpA filed Critical Ilva SpA
Priority to US07/563,959 priority patent/US5000362A/en
Publication of EP0400257A1 publication Critical patent/EP0400257A1/de
Priority to GR91300051T priority patent/GR910300051T1/el
Publication of EP0400257B1 publication Critical patent/EP0400257B1/de
Application granted granted Critical
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D41/00—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
    • B22D41/14—Closures
    • B22D41/22—Closures sliding-gate type, i.e. having a fixed plate and a movable plate in sliding contact with each other for selective registry of their openings
    • B22D41/24—Closures sliding-gate type, i.e. having a fixed plate and a movable plate in sliding contact with each other for selective registry of their openings characterised by a rectilinearly movable plate
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D41/00—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
    • B22D41/14—Closures
    • B22D41/22—Closures sliding-gate type, i.e. having a fixed plate and a movable plate in sliding contact with each other for selective registry of their openings
    • B22D41/28—Plates therefor

Definitions

  • Slide-gate pouring appliances for ladles and similar devices have been commonly used for about two decades now. They were however designed far earlier, at the beginning of the last century, and the long delay before they were applied must be blamed on the fact that to enable them to operate properly, refractory bricks with high mechanical, thermal and chemical properties are required. These properties have become available only relatively recently, and since then slide-gate pouring appliances have continued to become increasingly widespread. First of all they were applied to smaller gates and then, gradually, to larger ones.
  • the basic refractory elements of a slide-gate shut-off device consist of two holed plates of which one is fixed and one is sliding, of a sleeve below the sliding refractory plate known as the external pouring appliance and a sleeve above the fixed refractory plate known as the internal pouring appliance.
  • the internal pouring appliance is not directly surrounded by the refractory lining of the ladle, but isolated from it by means of a larger sleeve, called the pouring-applicance holder and which, unlike the internal pouring appliance has to be fitted and replaced from inside the ladle.
  • This pouring-appliance holder is also an integral part of the slide-gate pouring appliance.
  • Patent LU-A-59070 relates to flow control and closure means suitable for operation at very high temperature and in particular to the sliding plate valve for casting ladles and like containers for molten metal.
  • the related device has a very different purpose from the present invention and apparently requires a relatively large number of stoppages for maintenance activities which cause frequent interruption of the work cycle.
  • the aim of this invention is to implement a large slide-gate shut-off device, the parts of which will wear out at the same rate. In this way it will be possible to space maintenance activities further apart, without the wastages caused by early replacement of parts which are not yet fully worn out. According to this invention, this aim has been fulfilled not only simply by increasing the dimensions (for example the thicknesses) of the parts which wear out more rapidly but also and above all by correctly configuring the various parts of the shut-off device.
  • the shut-off device made of refractory material includes an internal pouring-appliance holder made up of two superimposed elements indicated by 11 and 12, the mating surface of which is fitted with a centering key 13. These two elements have to be fitted from inside the ladle and of course their replacement times will be far longer than the replacement times of the remaining refractory elements of the shut-off device, which can be disassembled and reassembled from outside the ladle.
  • the inside surface of the pouring-device holder 11-12 has a first upper piece, truncated-cone shaped, 14, open at the top where it is shaped like a funnel suitable for conveying the liquid metal downwards.
  • the height of this first part, indicated with the number 14, is about 2-3 times the radius R of the minimum cross-section of the duct through which the liquid metal passes.
  • the value of said radius R shall be assumed as a conventional unit of measurement.
  • the radius R is chosen, from time to time, depending on the dimensions of the ladle and of the capacity of the devices downstream from the latter which have to receive the flow of molten steel.
  • the tangent of the opening angle of the conical surface 14 is comprised between above 0.2-0.4; below this first conical portion there is a second, cylindrical, portion 15, the height of which is equal to about 0.2 - 2 times R. Below this, the inside surface of the pouring-appliance holder 11-12 has again a conical shape, opening out towards the bottom, and the angle of opening of which is about 2-6 degrees. This angle allows the internal pouring appliance 20 to be inserted or removed from underneath.
  • the internal pouring appliance 20 has a height of about 10 times R, and is passed through by a hole 21 formed by an upper conical part 22, and a lower cylindrical part 23.
  • the height of the lower cylindrical part 23 is about 3-4 times R.
  • the tangent of the angle at the vertex of the conical surface 22 is approximately equal to 0.15-0.45.
  • the width of the upper ring-shaped base 24 of the internal pouring appliance 20 is approximately equal to R and starts just below the cylindrical part 15 of the pouring-appliance holder 11-12. In this way a step is created which will wear out progressively due to the abrasive effect of the liquid steel, gradually transforming the conical surfaces 14 and 21 into a single surface shaped more or less like a paraboloid of revolution.
  • the flow of liquid steel is now directed towards the boundary and enters the cylindrical duct 22-23 causing less wear.
  • the radial thickness of the lower ring-shaped base 25 of the internal pouring appliance 20 will be approximately equal to 2R.
  • the lower ring-shaped base 25 of the internal pouring appliance 20 has a circular rib 26 located in the vicinity of the outer rim of the base itself. This circular rib serves as a centering element between the lower base of the internal pouring appliance 20 and the upper surface of the fixed refractory plate 30 which is equipped with a corresponding groove 31.
  • the plate 30 is equipped with a central hole having a radius R, and its thickness is approximately the same; the remaining relative dimensions of the fixed refractory plate 30 are described in detail below.
  • the underside of the fixed upper plate 30 is accurately flattened, since it serves as a sealing surface over which the upper surface of the underlying sliding refractory plate 40 slides.
  • the sliding plate 40 also has a central hole 42, and on its underside a circular groove 41 which accommodates a corresponding rib 51 protruding from the upper ring-shaped base 52 of the lower sleeve 50, which slides together with the lower plate 40 and forms the external pouring appliance.
  • the radial thickness of the lower sleeve 50 is approximately equal to R, and its height H1 is about 6-12 times the radius R of the pouring hole.
  • the hole 53 of the lower sleeve 50 is cylindrical, and its lateral surface 54 is also cylindrical although it has at the bottom a conically bevelled edge which makes it easier to insert the lower end of the external pouring appliance into the upper end of an underlying plunger type pouring appliance below it.
  • the fixed upper plate 20 is illustrated in detail in figures 3 and 12: it is symmetrical in respect of two orthogonal horizontal axes and its width is equal to approximately 5-7 times the radius R, while its length is approximately equal to 12-16 times the radius R.
  • the two ends 33 of the refractory plate 30 are shaped as semicircles with centres 34. The distance between the centres 34 and 35 corresponds roughly to double the relative travel of the fixed and mobile plates. In this way the distribution of the refractory material is optimized, as its free edges are always at the same distance from the area in contact with the molten steel, whatever the working position of the distribution device may be.
  • the fixed upper refractory plate 30 has a metal covering 60 consisting of a sheet of lamina 61 which covers the contour of the plate 30 and has an outer edge 62.
  • the height of this edge 62 is approximately equal to the thickness of the plate 30 and its upper edge 63 is curved slightly outwards, as shown in the close-up of figure 12, so as to strengthen the covering itself and allow easy insertion of the plate 30 inside the covering 60 during assembly, without excessive clearances and consequent excessive thickness of the layer of refractory mortar 64 located between the plate 30 and the covering 60.
  • the covering 60 also has on the bottom 61 a circular opening 65, the rim 66 of which is folded inwards into an arch so as to create a supporting surface for the refractory plate which is supported at a pre-established height from the bottom 61 of the covering.
  • the height of this rim 66 also defines the thickness of the layer of mortar.
  • the thickness of the layer of mortar 64 is also ensured by protrusions 67 made by presswork and arranged on the bottom 61.
  • the circular opening 65 in the bottom of the covering 60 is larger than the outside diameter of the internal pouring appliance 20, so that there is no interference, as shown in figure 1.
  • the sliding refractory plate 40 differs from the fixed refractory plate 30 in that the circular groove 41 has a smaller diameter in view of the lesser thickness of the lower refractory sleeve 50 as compared to the thickness of the internal pouring appliance 20.
  • This difference between the plates 30 and 40 on the one hand and the refractory sleeves 20 and 50 on the other, is very important for the purposes of the invention. Indeed the internal pouring appliance 20 wears out more quickly than the sleeve 50 in the hole of which the flow of liquid steel is already perfectly directed along vertical flowlines.
  • the refractory sleeve 50 As far as concerns the refractory sleeve 50, it should be noted that it too has a metal casing 56, with a double sloping truncated cone shape.
  • the lower part 58 supports directly the weight of the sleeve 50, while the upper part 57 defines a meatus with a decreasing thickness inside which the connecting refractory mortar is placed.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
  • Sliding Valves (AREA)
  • Furnace Charging Or Discharging (AREA)
  • Lift Valve (AREA)

Claims (19)

  1. Schieber-Absperreinrichtung, hergestellt aus feuerfestem Material der Bauart mit:
    (a) einer festen Feuerfestplatte (30)
    (b) einer unter ihr angeordneten Schieber-Feuerfestplatte, wobei beide Platten mit einem durchgehenden Loch mit einem Radius R versehen sind,
    (c) einer Buchse aus Feuerfestmaterial, hergestellt aus feuerfesten fest mit dem letzteren verbundenen Material oberhalb der festen Feuerfestplatte (30),
    (d) einer festen Feuerfestbuchse, auch als innere Gießeinrichtung (20) bekannt, die mit einer durchgehenden Führung mit Minimumquerschnitt vom Radius R versehen ist, zum Durchleiten eines flüssigen Metalls, um die ein Gießeinrichtungshalter (11-12) (e) angeordnet ist, dadurch gekennzeichnet, daß diese Feuerfestplatten (30 und 40) in der Mitte mit einem Loch versehen und symmetrisch bezüglich zwei orthogonalen und horizontalen Axen sind;
    daß diese innere Gießeinrichtung (20) eine radiale Dicke an ihrer Bodenbasis (25) hat, die etwa gleich der doppelten radialen Dicke der unteren gleitenden Feuerfestbuchse (50) ist, wobei deren radiale Dicke in etwa gleich R ist; wobei diese innere Gießeinrichtung (20) eine Höhe etwa gleich dem 10-fachen von R ist und durch die ein Loch (21) geht, das durch einen oberen konischen Teil (22) gebildet ist, wobei dieser konische Teil (22) einen Tangentenwinkel am Scheitel zwischen 0,15 bis 0,45 hat, und ein zylindrischer unterer Teil (23) vorgesehen ist, wobei dieser zylindrische Teil (23) über einen Radius gleich R verfügt; wobei diese innere Gießeinrichtung (20) über eine obere ringförmige Basis senkrecht zu einer Wand mit einer Dicke in Höhe der Basis (24) gleich R verfügt, wobei diese Wand kurz unterhalb eines zylindrischen Teils (15) des Gießeinrichtungshalters (11-12) positioniert ist.
  2. Gießeinrichtung nach dem vorhergehenden Anspruch, dadurch gekennzeichnet, daß diese Feuerfestplatten (30 und 40) halbkreisförmig ausgestaltete Ränder auf ihren Enden haben; daß die Dicke dieser Platten (30 und 40) in etwa gleich dem Radius R des durch sie hindurchgehenden Gießloches ist.
  3. Schieber-Absperreinrichtung nach Anspruch 1, dadurch gekennzeichnet, daß die äußere Fläche der inneren Gießeinrichtung (20) konisch ist und sich gegen den Kopf mit einem Öffnungswinkel von etwa 2 - 6 Grad verschmälert.
  4. Absperreinrichtung nach Anspruch 1, dadurch gekennzeichnet, daß diese innere Gießeinrichtung (20) die Höhe der unteren Länge, gleich dem etwa 3 - 5-fachen Gesamthöhe der inneren Gießeinrichtung, hat.
  5. Absperreinrichtung nach Anspruch 1, dadurch gekennzeichnet, daß die radiale Dicke der oberen Basis (24) der inneren Gießeinrichtung (20) etwa gleich dem Radius R ist.
  6. Schieber-Absperreinrichtung nach Anspruch 1, dadurch gekennzeichnet, daß die Höhe der unteren feuerfesten Buchse (50) gleich etwa dem 6 - 12-fachen des Radius R ist.
  7. Schieber-Absperreinrichtung nach Anspruch 1, dadurch gekennzeichnet, daß sie einen Gießeinrichtungshalter (11-12) hat, der mit einem Axialloch versehen ist, der in drei übereinander lagernden Längen unterteilt ist, wobei die erste dieser Längen, die vom Boden ausgeht, eine konische Fläche (14) hat, die geeignet ist, um die entsprechende konische Fläche (21) der inneren Gießeinrichtung (20) aufzunehmen; die zweite dieser Längen (15) zylindrisch ist und über eine Höhe von etwa dem 0,2 - 2-fachen des Radius R verfügt; die dritte dieser Längen wieder konisch ist und sich nach oben weitet, mit einem Öffnungswinkel der Tangente gleich etwa 0,2 - 0,4 und mit einer Höhe von etwa dem 2 - 4-fachen des Radius R.
  8. Schieber-Absperreinrichtung nach Anspruch 7, dadurch gekennzeichnet, daß der Gießeinrichtungshalter (11-12) aus zwei einander überlagernden Elementen besteht, dessen zueinander passende Flächen mit entsprechenden Zentrierstufen (13) versehen sind.
  9. Schieber-Absperreinrichtung nach Anspruch 1, dadurch gekennzeichnet, daß jede der Feuerfestplatten (20) eine Breite zwischen dem 4- und 8-fachen des Radius R und eine Länge von etwa dem 12 - 16-fachen dieses Radius R hat.
  10. Schieber-Absperreinrichtung nach Anspruch 1, dadurch gekennzeichnet, daß die innere Gießeinrichtung (20) auf dem äußeren Rand ihrer ringförmigen unteren Basis (25) eine ringformige Zentrierrippe (26) hat, deren entsprechender Sitz sich in einer ringförmigen Nut (31) auf der Oberseite der oberen festen Platte (30) befindet.
  11. Schieber-Absperreinrichtung nach Anspruch 1, dadurch gekennzeichnet, daß die äußere Gießeinrichtung benachbart dem äußeren Rand ihrer ringförmigen oberen Basis (24) eine ringförmige Zentrierrippe hat, deren entsprechender Sitz sich in einer ringförmigen Nut (41) auf der oberen Fläche der unteren Schieberplatte (40) befindet.
  12. Schieber-Absperreinrichtung nach den Ansprüchen 10 und 11, dadurch gekennzeichnet, daß diese Rippen (26) und Nuten (31 und 41) in der festen Platte (30) und der inneren Gießeinrichtung (20) auf der einen Seite und in der Schieberplatte (40) und der äußeren Gießeinrichtung auf der anderen Seite unterschiedliche Durchmesser haben.
  13. Schieber-Absperreinrichtung nach Anspruch 1, dadurch gekennzeichnet, daß beide, die feste Platte (30) und die Schieberplatte (40) mit einer Metallabdeckung (60) ausgestattet sind, die aus Blech gemacht ist und die Oberfläche der Basis gegenüber der Oberfläche des gegenseitigen Kontakts und die Seitenfläche um die Kante (62) abdeckt.
  14. Schieber-Absperreinrichtung nach Anspruch 13, dadurch gekennzeichnet, daß die Kanten (62) dieser Abdeckung (60) nach außen gebogen sind, um das Einführen der Feuerfestplatte (30) und das Aussteifen der Abdeckung (60) zu erleichtern.
  15. Schieber-Absperreinrichtung nach Anspruch 13 und 14, dadurch gekennzeichnet, daß der flache Boden (61) dieser Metallabdeckung (60) über eine kreisförmige Öffnung (65) mit einem Durchmesser verfügt, der größer als der der ringförmigen Nut (41), die auf der zugeordneten Feuerfestplatte (40) sich befindet, ist.
  16. Schieber-Absperreinrichtung nach Anspruch 15, dadurch gekennzeichnet, daß die Kante dieser Öffnung (65) nach innen umgebogen ist, um so den Boden der Abdeckung (60) auszusteifen und so die zugeordnete Feuerfestplatte vom Boden (61) des Gehäuses um einen bestimmten voreingestellten Abstand, der gleich der gewünschten Dicke des feuerfesten Mörtels (64) ist, entfernt zu halten.
  17. Schieber-Absperreinrichtung nach Anspruch 16, dadurch gekennzeichnet, daß die Vorsprünge (67) auf dem Boden (61) der Abdeckung (60) angeordnet und in der Lage sind, zusammen mit den abgebogenen Kanten dieser Öffnung, die verbleibende Fläche der Feuerfestplatte (30) und damit die erforderliche Dicke des Mörtels (64) zu definieren.
  18. Schieber-Absperreinrichtung nach Anspruch 1, dadurch gekennzeichnet, daß die untere feuerfeste Buchse (50) eine Metallabdeckung (56) hat, die sich über ihre äußeren Seitenflächen erstreckt.
  19. Schieber-Absperreinrichtung nach Anspruch 10, 11 und 12, dadurch gekennzeichnet, daß das radiale Profil dieser ringförmigen Rippen (26) und Nuten (41 und 31) von im wesentlichen sinusförmiger Gestalt ist und bevorzugt aus drei abwechselnd konkaven und konvexen Bögen eines Kreises besteht.
EP89830243A 1989-06-02 1989-06-02 Schieberverschluss aus einer feuerfesten Masse für metallurgische Behälter Expired - Lifetime EP0400257B1 (de)

Priority Applications (7)

Application Number Priority Date Filing Date Title
DE68926293T DE68926293T2 (de) 1989-06-02 1989-06-02 Schieberverschluss aus einer feuerfesten Masse für metallurgische Behälter
ES89830243T ES2020156A4 (es) 1989-06-02 1989-06-02 Valvula de puerta deslizable hecha de un material refractario para vasijas metalurgicas
DE198989830243T DE400257T1 (de) 1989-06-02 1989-06-02 Schieberverschluss aus einer feuerfesten masse fuer metallurgische behaelter.
AT89830243T ATE136828T1 (de) 1989-06-02 1989-06-02 Schieberverschluss aus einer feuerfesten masse für metallurgische behälter
EP89830243A EP0400257B1 (de) 1989-06-02 1989-06-02 Schieberverschluss aus einer feuerfesten Masse für metallurgische Behälter
US07/563,959 US5000362A (en) 1989-06-02 1990-08-07 Shut-off device made of refractory material for a slide-gate pouring appliance
GR91300051T GR910300051T1 (en) 1989-06-02 1991-11-15 Slide gate valve made of a refractory material for metallurgical vessels

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP89830243A EP0400257B1 (de) 1989-06-02 1989-06-02 Schieberverschluss aus einer feuerfesten Masse für metallurgische Behälter

Publications (2)

Publication Number Publication Date
EP0400257A1 EP0400257A1 (de) 1990-12-05
EP0400257B1 true EP0400257B1 (de) 1996-04-17

Family

ID=8203223

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89830243A Expired - Lifetime EP0400257B1 (de) 1989-06-02 1989-06-02 Schieberverschluss aus einer feuerfesten Masse für metallurgische Behälter

Country Status (5)

Country Link
EP (1) EP0400257B1 (de)
AT (1) ATE136828T1 (de)
DE (2) DE68926293T2 (de)
ES (1) ES2020156A4 (de)
GR (1) GR910300051T1 (de)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2113271B1 (es) * 1994-09-07 1999-01-01 Krosaki Corp Estructura de fijacion de bastidor de placa metalica para tobera deslizante.
DE10066084B4 (de) * 1999-09-10 2007-03-15 Yamaha Corp., Hamamatsu Tastenmusikinstrument mit Sichtanzeigeeinheit
DE102021004626A1 (de) 2021-09-14 2023-03-16 PiRé Feuerfeste Produkte GmbH & Co. KG Verfahren zur Reparatur eines Schieberverschlusses

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1273553A (en) * 1968-07-11 1972-05-10 Interstop Ag Improvements in closure means for casting ladles and like containers for molten metal
GB1490982A (en) * 1974-01-16 1977-11-09 Flogates Ltd Pouring of molten metals
JPS5527495A (en) * 1978-08-19 1980-02-27 Stopinc Ag Threeeply system sliding closing appliance
IT1123960B (it) * 1979-01-15 1986-05-07 Sanac Spa Refrattari Argille & Mattone refrattario perfezionato con rivestimento metallico
US4561573A (en) * 1982-08-20 1985-12-31 Flo-Con Systems, Inc. Valve and replaceable collector nozzle

Also Published As

Publication number Publication date
ES2020156A4 (es) 1991-08-01
DE68926293T2 (de) 1996-09-19
ATE136828T1 (de) 1996-05-15
DE68926293D1 (de) 1996-05-23
DE400257T1 (de) 1991-05-23
EP0400257A1 (de) 1990-12-05
GR910300051T1 (en) 1991-11-15

Similar Documents

Publication Publication Date Title
KR960015336B1 (ko) 연속 주조 주형에 선행 배치된 주입관
KR0144365B1 (ko) 슬라이딩 게이트 밸브용 밸브판 및 밸브
US4327847A (en) Sliding gate nozzles
EP0571768A2 (de) Einhebelmischventilkartusche für heisses und kaltes Wasser
US5948349A (en) Ladle for the preparation of metal provided with a refractory bottom lining and method for producing said refractory bottom lining
KR102453986B1 (ko) 턴디쉬 출구 변경장치
EP0400257B1 (de) Schieberverschluss aus einer feuerfesten Masse für metallurgische Behälter
US4314659A (en) Rotary valve
SU1732809A3 (ru) Металлургическа емкость с поворотным затвором, огнеупорные ротор и статор дл него
US20140061257A1 (en) Refractory element, assembly and tundish for transferring molten metal
US5000362A (en) Shut-off device made of refractory material for a slide-gate pouring appliance
JP2008516772A (ja) 冶金学的溶融鍋のための湯出しチューブ
BR0305780B1 (pt) amortecedor de impacto para distribuidor.
KR20030003729A (ko) 일체형 내부 노즐 및 이 노즐을 유지하기 위한 체결 장치
EP0091110A1 (de) Schieberverschluss
KR101826386B1 (ko) 용융 금속을 수용하는 용기의 스파우트 상의 미끄럼 밀폐부 및 밀폐 플레이트
CA1126472A (en) Rotary valve
EP0223561A1 (de) Drehverschlusssystem
RU2561619C2 (ru) Огнеупорный блок для шиберного затвора в сливном отверстии емкости для металлического расплава
JP7345368B2 (ja) スライディングゲートのコレクターノズル及びその使用方法
GB2085126A (en) Valve plates for a sliding gate valve
JPH0210094A (ja) 金属溶湯が入つている容器の出湯口用の回転又は摺動閉鎖装置及びこのような閉鎖装置用の閉鎖部材
US5704184A (en) Impact pad for ladles
EA005063B1 (ru) Устройство для предотвращения эффекта завихрения в зоне выпускного отверстия металлургической плавильной емкости
AU754954B2 (en) Closure plate and a slide gate on the outlet of a container containing molten metal

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE CH DE ES FR GB GR LI LU NL SE

TCNL Nl: translation of patent claims filed
TCAT At: translation of patent claims filed
EL Fr: translation of claims filed
DET De: translation of patent claims
17P Request for examination filed

Effective date: 19901205

17Q First examination report despatched

Effective date: 19930806

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: ILVA S.P.A.

Owner name: VESUVIUS ITALIA S.P.A.

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT BE CH DE ES FR GB GR LI LU NL SE

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 19960417

Ref country code: LI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 19960417

Ref country code: GR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 19960417

Ref country code: FR

Effective date: 19960417

Ref country code: CH

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 19960417

Ref country code: BE

Effective date: 19960417

Ref country code: AT

Effective date: 19960417

REF Corresponds to:

Ref document number: 136828

Country of ref document: AT

Date of ref document: 19960515

Kind code of ref document: T

REG Reference to a national code

Ref country code: CH

Ref legal event code: NV

Representative=s name: KATZAROV S.A.

REF Corresponds to:

Ref document number: 68926293

Country of ref document: DE

Date of ref document: 19960523

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: ES

Free format text: LAPSE BECAUSE OF THE APPLICANT RENOUNCES

Effective date: 19960603

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LU

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19960630

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Effective date: 19960717

Ref country code: GB

Effective date: 19960717

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

EN Fr: translation not filed
NLV1 Nl: lapsed or annulled due to failure to fulfill the requirements of art. 29p and 29m of the patents act
REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

PLBQ Unpublished change to opponent data

Free format text: ORIGINAL CODE: EPIDOS OPPO

PLBI Opposition filed

Free format text: ORIGINAL CODE: 0009260

PLBF Reply of patent proprietor to notice(s) of opposition

Free format text: ORIGINAL CODE: EPIDOS OBSO

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Effective date: 19970301

26 Opposition filed

Opponent name: NUOVA SIRMA SPA

Effective date: 19970115

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 19960717

PLBF Reply of patent proprietor to notice(s) of opposition

Free format text: ORIGINAL CODE: EPIDOS OBSO

REG Reference to a national code

Ref country code: ES

Ref legal event code: FD2A

Effective date: 19991007

PLBO Opposition rejected

Free format text: ORIGINAL CODE: EPIDOS REJO

PLBN Opposition rejected

Free format text: ORIGINAL CODE: 0009273

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: OPPOSITION REJECTED

27O Opposition rejected

Effective date: 20000112